render: get first image from RenderGraph, just a simple hard coded triangle

.lapce/run.toml

@@ -0,0 +1,29 @@
+# The run config is used for both run mode and debug mode
+
+[[configs]]
+# the name of this task
+name = "Example 'simple_scene'"
+
+# the type of the debugger. If not set, it can't be debugged but can still be run
+type = "lldb"
+
+# the program to run
+program = "../../target/debug/simple_scene"
+
+# the program arguments, e.g. args = ["arg1", "arg2"], optional
+# args = []
+
+# current working directory, optional
+cwd = "${workspace}/examples/simple_scene"
+
+# environment variables, optional
+# [configs.env]
+# VAR1 = "VAL1"
+# VAR2 = "VAL2"
+
+# task to run before the run/debug session is started, optional
+[configs.prelaunch]
+program = "cargo"
+args = [
+  "build",
+]

Cargo.lock

@@ -3065,6 +3065,16 @@ version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d66dc143e6b11c1eddc06d5c423cfc97062865baf299914ab64caa38182078fe"
 
+[[package]]
+name = "simple_scene"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "async-std",
+ "lyra-engine",
+ "tracing",
+]
+
 [[package]]
 name = "slab"
 version = "0.4.9"

examples/simple_scene/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "simple_scene"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+lyra-engine = { path = "../../", features = ["tracy"] }
+anyhow = "1.0.75"
+async-std = "1.12.0"
+tracing = "0.1.37"

examples/simple_scene/scripts/test.lua

@@ -0,0 +1,59 @@
+---Return the userdata's name from its metatable
+---@param val userdata
+---@return string
+function udname(val)
+    return getmetatable(val).__name
+end
+
+function on_init()
+    local cube = world:request_res("../assets/cube-texture-embedded.gltf")
+    print("Loaded textured cube (" .. udname(cube) .. ")")
+
+    cube:wait_until_loaded()
+    local scenes = cube:scenes()
+    local cube_scene = scenes[1]
+
+    local pos = Transform.from_translation(Vec3.new(0, 0, -8.0))
+
+    local e = world:spawn(pos, cube_scene)
+    print("spawned entity " .. tostring(e))
+end
+
+--[[ function on_first()
+    print("Lua's first function was called")
+end
+
+function on_pre_update()
+    print("Lua's pre-update function was called")
+end ]]
+
+function on_update()
+    --[[ ---@type number
+    local dt = world:resource(DeltaTime)
+    local act = world:resource(ActionHandler)
+    ---@type number
+    local move_objs = act:get_axis("ObjectsMoveUpDown")
+
+    world:view(function (t)
+        if move_objs ~= nil then
+            t:translate(0, move_objs * 0.35 * dt, 0)
+            return t
+        end
+    end, Transform) ]]
+
+    ---@type number
+    local dt = world:resource(DeltaTime)
+
+    world:view(function (t)
+        t:translate(0, 0.15 * dt, 0)
+        return t
+    end, Transform)
+end
+
+--[[ function on_post_update()
+    print("Lua's post-update function was called")
+end
+
+function on_last()
+    print("Lua's last function was called")
+end ]]

examples/simple_scene/src/main.rs

@@ -0,0 +1,149 @@
+use lyra_engine::{
+    assets::{gltf::Gltf, ResourceManager},
+    game::Game,
+    input::{
+        Action, ActionHandler, ActionKind, ActionMapping, ActionMappingId, ActionSource,
+        InputActionPlugin, KeyCode, LayoutId, MouseAxis, MouseInput,
+    },
+    math::{self, Transform, Vec3},
+    render::light::directional::DirectionalLight,
+    scene::{
+        CameraComponent, FreeFlyCamera, FreeFlyCameraPlugin, WorldTransform,
+        ACTLBL_LOOK_LEFT_RIGHT, ACTLBL_LOOK_ROLL, ACTLBL_LOOK_UP_DOWN,
+        ACTLBL_MOVE_FORWARD_BACKWARD, ACTLBL_MOVE_LEFT_RIGHT, ACTLBL_MOVE_UP_DOWN,
+    },
+};
+
+#[async_std::main]
+async fn main() {
+    let action_handler_plugin = |game: &mut Game| {
+        let action_handler = ActionHandler::builder()
+            .add_layout(LayoutId::from(0))
+            .add_action(ACTLBL_MOVE_FORWARD_BACKWARD, Action::new(ActionKind::Axis))
+            .add_action(ACTLBL_MOVE_LEFT_RIGHT, Action::new(ActionKind::Axis))
+            .add_action(ACTLBL_MOVE_UP_DOWN, Action::new(ActionKind::Axis))
+            .add_action(ACTLBL_LOOK_LEFT_RIGHT, Action::new(ActionKind::Axis))
+            .add_action(ACTLBL_LOOK_UP_DOWN, Action::new(ActionKind::Axis))
+            .add_action(ACTLBL_LOOK_ROLL, Action::new(ActionKind::Axis))
+            .add_action("Debug", Action::new(ActionKind::Button))
+            .add_mapping(
+                ActionMapping::builder(LayoutId::from(0), ActionMappingId::from(0))
+                    .bind(
+                        ACTLBL_MOVE_FORWARD_BACKWARD,
+                        &[
+                            ActionSource::Keyboard(KeyCode::W).into_binding_modifier(1.0),
+                            ActionSource::Keyboard(KeyCode::S).into_binding_modifier(-1.0),
+                        ],
+                    )
+                    .bind(
+                        ACTLBL_MOVE_LEFT_RIGHT,
+                        &[
+                            ActionSource::Keyboard(KeyCode::A).into_binding_modifier(-1.0),
+                            ActionSource::Keyboard(KeyCode::D).into_binding_modifier(1.0),
+                        ],
+                    )
+                    .bind(
+                        ACTLBL_MOVE_UP_DOWN,
+                        &[
+                            ActionSource::Keyboard(KeyCode::C).into_binding_modifier(1.0),
+                            ActionSource::Keyboard(KeyCode::Z).into_binding_modifier(-1.0),
+                        ],
+                    )
+                    .bind(
+                        ACTLBL_LOOK_LEFT_RIGHT,
+                        &[
+                            ActionSource::Mouse(MouseInput::Axis(MouseAxis::X)).into_binding(),
+                            ActionSource::Keyboard(KeyCode::Left).into_binding_modifier(-1.0),
+                            ActionSource::Keyboard(KeyCode::Right).into_binding_modifier(1.0),
+                        ],
+                    )
+                    .bind(
+                        ACTLBL_LOOK_UP_DOWN,
+                        &[
+                            ActionSource::Mouse(MouseInput::Axis(MouseAxis::Y)).into_binding(),
+                            ActionSource::Keyboard(KeyCode::Up).into_binding_modifier(-1.0),
+                            ActionSource::Keyboard(KeyCode::Down).into_binding_modifier(1.0),
+                        ],
+                    )
+                    .bind(
+                        ACTLBL_LOOK_ROLL,
+                        &[
+                            ActionSource::Keyboard(KeyCode::E).into_binding_modifier(-1.0),
+                            ActionSource::Keyboard(KeyCode::Q).into_binding_modifier(1.0),
+                        ],
+                    )
+                    .bind(
+                        "Debug",
+                        &[ActionSource::Keyboard(KeyCode::B).into_binding()],
+                    )
+                    .finish(),
+            )
+            .finish();
+
+        let world = game.world_mut();
+        world.add_resource(action_handler);
+        game.with_plugin(InputActionPlugin);
+    };
+
+    Game::initialize()
+        .await
+        .with_plugin(lyra_engine::DefaultPlugins)
+        .with_plugin(setup_scene_plugin)
+        .with_plugin(action_handler_plugin)
+        //.with_plugin(camera_debug_plugin)
+        .with_plugin(FreeFlyCameraPlugin)
+        .run()
+        .await;
+}
+
+fn setup_scene_plugin(game: &mut Game) {
+    let world = game.world_mut();
+    let resman = world.get_resource_mut::<ResourceManager>();
+    
+    /* let camera_gltf = resman
+        .request::<Gltf>("../assets/AntiqueCamera.glb")
+        .unwrap();
+
+    camera_gltf.wait_recurse_dependencies_load();
+    let camera_mesh = &camera_gltf.data_ref().unwrap().scenes[0];
+    drop(resman);
+
+    world.spawn((
+        camera_mesh.clone(),
+        WorldTransform::default(),
+        Transform::from_xyz(0.0, -5.0, -2.0),
+    )); */
+
+    let cube_gltf = resman
+        .request::<Gltf>("../assets/cube-texture-embedded.gltf")
+        .unwrap();
+
+    cube_gltf.wait_recurse_dependencies_load();
+    let cube_mesh = &cube_gltf.data_ref().unwrap().scenes[0];
+    drop(resman);
+
+    world.spawn((
+        cube_mesh.clone(),
+        WorldTransform::default(),
+        Transform::from_xyz(0.0, -5.0, -2.0),
+    ));
+
+    {
+        let mut light_tran = Transform::from_xyz(1.5, 2.5, 0.0);
+        light_tran.scale = Vec3::new(0.5, 0.5, 0.5);
+        light_tran.rotate_x(math::Angle::Degrees(-45.0));
+        light_tran.rotate_y(math::Angle::Degrees(25.0));
+        world.spawn((
+            DirectionalLight {
+                enabled: true,
+                color: Vec3::ONE,
+                intensity: 0.15, //..Default::default()
+            },
+            light_tran,
+        ));
+    }
+
+    let mut camera = CameraComponent::new_3d();
+    camera.transform.translation += math::Vec3::new(0.0, 0.0, 5.5);
+    world.spawn((camera, FreeFlyCamera::default()));
+}

lyra-game/src/game.rs

@@ -57,10 +57,12 @@ struct GameLoop {
 }
 
 impl GameLoop {
-    pub async fn new(window: Arc<Window>, world: World, staged_exec: StagedExecutor) -> GameLoop {
+    pub async fn new(window: Arc<Window>, mut world: World, staged_exec: StagedExecutor) -> Self {
+        let renderer = BasicRenderer::create_with_window(&mut world, window.clone()).await;
+
         Self {
             window: Arc::clone(&window),
-            renderer: Box::new(BasicRenderer::create_with_window(window).await),
+            renderer: Box::new(renderer),
 
             world,
             staged_exec,
@@ -68,7 +70,7 @@ impl GameLoop {
     }
 
     pub async fn on_resize(&mut self, new_size: winit::dpi::PhysicalSize<u32>) {
-        self.renderer.on_resize(new_size);
+        self.renderer.on_resize(&mut self.world, new_size);
     }
 
     pub async fn on_init(&mut self) {

lyra-game/src/lib.rs

@@ -1,6 +1,7 @@
 #![feature(hash_extract_if)]
 #![feature(lint_reasons)]
 #![feature(trait_alias)]
+#![feature(map_many_mut)]
 
 extern crate self as lyra_engine;
 

lyra-game/src/render/graph/execution_path.rs

@@ -11,7 +11,7 @@ pub struct GraphExecutionPath {
 }
 
 impl GraphExecutionPath {
-    pub fn new(pass_descriptions: Vec<&RenderGraphPassDesc>) -> Self {
+    pub fn new(built_in_slots: FxHashSet<u64>, pass_descriptions: Vec<&RenderGraphPassDesc>) -> Self {
         // collect all the output slots
         let mut total_outputs = HashMap::new();
         for desc in pass_descriptions.iter() {
@@ -28,6 +28,9 @@ impl GraphExecutionPath {
             // find the node inputs
             let mut inputs = vec![];
             for slot in desc.input_slots() {
+                // If the slot is built in to the graph, no need to care about the sorting.
+                if built_in_slots.contains(&slot.id) { continue; }
+
                 let inp = total_outputs.get(&slot.name)
                     .expect(&format!("failed to find slot: '{}', ensure that there is a pass outputting it", slot.name));
                 inputs.push(*inp);

lyra-game/src/render/graph/mod.rs

@@ -1,5 +1,10 @@
 mod pass;
-use std::collections::HashMap;
+use std::{
+    cell::RefCell,
+    collections::{HashMap, VecDeque},
+    ptr::NonNull,
+    sync::Arc,
+};
 
 pub use pass::*;
 
@@ -11,14 +16,22 @@ pub use slot_desc::*;
 
 mod execution_path;
 
-use rustc_hash::FxHashMap;
+use rustc_hash::{FxHashMap, FxHashSet};
-use tracing::debug;
+use tracing::{debug, debug_span, instrument};
 use wgpu::{util::DeviceExt, RenderPass};
 
-use super::{compute_pipeline::ComputePipeline, pipeline::Pipeline, render_pipeline::RenderPipeline, renderer::{BasicRenderer, Renderer}};
+use self::execution_path::GraphExecutionPath;
 
+use super::{
+    compute_pipeline::ComputePipeline,
+    pipeline::Pipeline,
+    render_pipeline::RenderPipeline,
+    renderer::{BasicRenderer, Renderer},
+};
+
+#[derive(Clone)]
 struct PassEntry {
-    inner: Box<dyn RenderGraphPass>,
+    inner: Arc<RefCell<dyn RenderGraphPass>>,
     desc: RenderGraphPassDesc,
 }
 
@@ -46,80 +59,137 @@ pub struct PipelineResource {
 pub struct RenderGraph {
     slots: FxHashMap<u64, ResourcedSlot>,
     slot_names: HashMap<String, u64>,
-    // slots with same name 
-    slot_mutlikey: FxHashMap<u64, u64>,
     passes: FxHashMap<u64, PassEntry>,
     // TODO: Use a SlotMap
     bind_groups: FxHashMap<u64, wgpu::BindGroup>,
     // TODO: make pipelines a `type` parameter in RenderPasses,
     // then the pipelines can be retrieved via TypeId to the pass.
-    pipelines: HashMap<String, PipelineResource>,
+    ///
+    pipelines: FxHashMap<u64, PipelineResource>,
     current_id: u64,
+    exec_path: Option<GraphExecutionPath>,
 
     pub(crate) surface_config: wgpu::SurfaceConfiguration,
 }
 
 impl RenderGraph {
     pub fn new(surface_config: wgpu::SurfaceConfiguration) -> Self {
+        let mut slots = FxHashMap::default();
+        let mut slot_names = HashMap::default();
+
+        slots.insert(
+            0,
+            ResourcedSlot {
+                name: "window_texture_view".to_string(),
+                ty: SlotType::TextureView,
+                value: SlotValue::None,
+                bind_group_id: None,
+                create_desc: None,
+            },
+        );
+        slot_names.insert("window_texture_view".to_string(), 0u64);
+
         Self {
-            slots: Default::default(),
+            slots,
-            slot_names: Default::default(),
+            slot_names,
-            slot_mutlikey: Default::default(),
             passes: Default::default(),
             bind_groups: Default::default(),
             pipelines: Default::default(),
-            current_id: 0,
+            current_id: 1,
+            exec_path: None,
             surface_config,
         }
     }
 
+    pub fn next_id(&mut self) -> u64 {
+        self.current_id += 1;
+        self.current_id
+    }
+
     pub fn slot_id(&self, name: &str) -> Option<u64> {
         self.slot_names.get(name).cloned()
     }
 
+    pub fn slot_value(&self, id: u64) -> Option<&SlotValue> {
+        self.slots.get(&id).map(|s| &s.value)
+    }
+
     pub fn pass(&self, id: u64) -> Option<&RenderGraphPassDesc> {
-        self.passes.get(&id)
+        self.passes.get(&id).map(|s| &s.desc)
-            .map(|s| &s.desc)
     }
 
     pub fn add_pass<P: RenderGraphPass>(&mut self, pass: P) {
-        let mut desc = pass.desc(self, &mut self.current_id);
+        let mut desc = pass.desc(self);
 
         for slot in &mut desc.slots {
-            if let Some((id, other)) = self.slot_names.get(&slot.name)
+            if let Some((id, other)) = self
+                .slot_names
+                .get(&slot.name)
                 .and_then(|id| self.slots.get_mut(id).map(|s| (id, s)))
             {
                 slot.id = *id;
 
                 if slot.desc.is_some() && other.create_desc.is_none() {
-                    other.create_desc = slot.desc;
+                    other.create_desc = slot.desc.clone();
                 }
             } else {
                 let res_slot = ResourcedSlot {
-                    name: slot.name,
+                    name: slot.name.clone(),
                     ty: slot.ty,
                     value: SlotValue::None,
                     bind_group_id: None,
-                    create_desc: slot.desc,
+                    create_desc: slot.desc.clone(),
                 };
 
                 self.slots.insert(slot.id, res_slot);
-                self.slot_names.insert(slot.name, slot.id);
+                self.slot_names.insert(slot.name.clone(), slot.id);
             }
         }
 
-        self.passes.insert(desc.id, PassEntry {
+        self.passes.insert(
-            inner: Box::new(pass),
+            desc.id,
-            desc,
+            PassEntry {
-        });
+                inner: Arc::new(RefCell::new(pass)),
+                desc,
+            },
+        );
     }
 
     /// Creates all buffers required for the passes, also creates an internal execution path.
+    #[instrument(skip(self, device))]
     pub fn setup(&mut self, device: &wgpu::Device) {
+        let mut later_slots = VecDeque::new();
 
-        for slot in self.slots.values_mut() {
+        // For all passes, create their pipelines
-            if slot.bind_group_id.is_none() {
+        for pass in self.passes.values() {
-                match slot.create_desc {
+            if let Some(pipei) = &pass.desc.pipeline_info {
+                let pipeline = match pass.desc.pass_type {
+                    RenderPassType::Render => {
+                        let shader = device.create_shader_module(wgpu::ShaderModuleDescriptor {
+                            label: Some(pass.desc.name.as_str()),
+                            source: wgpu::ShaderSource::Wgsl(std::borrow::Cow::Borrowed(&pipei.source)),
+                        });
+                        Pipeline::Render(RenderPipeline::new(device, &self.surface_config, &shader, vec![], vec![]))
+                    }
+                    _ => todo!(),
+                };
+
+                let res = PipelineResource {
+                    pipeline,
+                    bg_layout_name_lookup: Default::default(),
+                };
+                self.pipelines.insert(pass.desc.id, res);
+            }
+        }
+
+        for (slot_id, slot) in &mut self.slots {
+            if slot.bind_group_id.is_none() && slot.create_desc.is_some() {
+                let s = debug_span!("res_creation", slot = slot.name);
+                let _e = s.enter();
+
+                debug!("Creating bind group for slot");
+
+                match &slot.create_desc {
                     Some(SlotDescriptor::BufferInit(bi)) => {
                         let label = format!("B_{}", slot.name);
                         let wb = bi.as_wgpu(Some(&label));
@@ -127,8 +197,8 @@ impl RenderGraph {
                         let buf = device.create_buffer_init(&wb);
                         slot.value = SlotValue::Buffer(buf);
 
-                        debug!(slot=slot.name, "Created and initialized buffer for slot");
+                        debug!("Created and initialized buffer for slot");
-                    },
+                    }
                     Some(SlotDescriptor::Buffer(b)) => {
                         let label = format!("B_{}", slot.name);
                         let wb = b.as_wgpu(Some(&label));
@@ -136,89 +206,116 @@ impl RenderGraph {
                         let buf = device.create_buffer(&wb);
                         slot.value = SlotValue::Buffer(buf);
 
-                        debug!(slot=slot.name, "Created buffer");
+                        debug!("Created buffer");
                     }
+                    Some(SlotDescriptor::Texture(t)) => {
+                        let label = format!("Tex_{}", slot.name);
+                        let wt = t.as_wgpu(Some(&label));
+
+                        let tex = device.create_texture(&wt);
+                        slot.value = SlotValue::Texture(tex);
+
+                        debug!("Created texture");
+                    }
+                    Some(SlotDescriptor::TextureView(tv)) => {
+                        // texture views cannot be done in this step. Not only would we run into a
+                        // borrow checker error when trying to get the texture for the view, we
+                        // can also not guarantee that the texture was actually created.
+                        let tex_slot = self
+                            .slot_names
+                            .get(&tv.texture_label)
+                            .expect("Failed to find texture for texture view slot");
+                        later_slots.push_back((*slot_id, *tex_slot));
+
+                        debug!("Queuing slot resources for later creation");
+                    }
+
                     //Some(SlotDescriptor::Sampler(b)) => {},
                     //Some(SlotDescriptor::Texture(b)) => {},
-                    //Some(SlotDescriptor::TextureView(b)) => {},
+                    Some(SlotDescriptor::None) => {}
-                    Some(SlotDescriptor::None) => {},
+                    None => {}
-                    None => {},
                     _ => todo!(),
                 }
             }
         }
 
-        todo!()
+        // create buffers for the queued slots
+        while let Some((lower_id, upper_id)) = later_slots.pop_front() {
+            let many = self.slots.get_many_mut([&lower_id, &upper_id]).unwrap();
+            let (lower_slot, upper_slot) = match many {
+                [a, b] => (a, b),
+            };
+
+            let s = debug_span!("deferred_res_creation", slot = lower_slot.name);
+            let _e = s.enter();
+
+            match &lower_slot.create_desc {
+                Some(SlotDescriptor::TextureView(tv)) => {
+                    let label = format!("TexView_{}", lower_slot.name);
+
+                    let wt = tv.as_wgpu(Some(&label));
+                    let tex = upper_slot.value.as_texture();
+
+                    let texview = tex.create_view(&wt);
+                    lower_slot.value = SlotValue::TextureView(texview);
+
+                    debug!(slot = lower_slot.name, "Created texture view");
+                }
+                Some(SlotDescriptor::None) => {}
+                None => {}
+                _ => unreachable!("this slot should not have been put into the do later list"),
+            }
+        }
     }
 
     pub fn prepare(&mut self) {
-        todo!()
+        let builtin = {
+            let mut h = FxHashSet::default();
+            h.insert(0u64);
+            h
+        };
+        let descs = self.passes.values().map(|p| &p.desc).collect();
+        self.exec_path = Some(GraphExecutionPath::new(builtin, descs));
     }
 
-    pub fn render(&mut self, renderer: &mut BasicRenderer) {
+    pub fn render(&mut self, device: &wgpu::Device, queue: &wgpu::Queue, surface: &wgpu::Surface) {
-        todo!()
+        let mut path = self.exec_path.take().unwrap();
+
+        let output = surface.get_current_texture().unwrap();
+        let view = output
+            .texture
+            .create_view(&wgpu::TextureViewDescriptor::default());
+
+        // update the window texture view slot.
+        let window_tv_slot = self.slots.get_mut(&0).unwrap(); // 0 is window_texture_view
+        debug_assert_eq!(
+            window_tv_slot.name.as_str(),
+            "window_texture_view",
+            "unexpected slot where 'window_texture_view' should be"
+        );
+        window_tv_slot.value = SlotValue::TextureView(view);
+
+        while let Some(pass_id) = path.queue.pop_front() {
+            let pass = self.passes.get(&pass_id).unwrap().clone();
+            let label = format!("{} Encoder", pass.desc.name);
+
+            let encoder = device.create_command_encoder(&wgpu::CommandEncoderDescriptor {
+                label: Some(&label),
+            });
+            let mut context = RenderGraphContext::new(encoder, queue);
+
+            let mut inner = pass.inner.borrow_mut();
+            inner.execute(self, &pass.desc, &mut context);
+
+            queue.submit(std::iter::once(context.encoder.finish()));
+        }
+
+        output.present();
     }
 
-    /// Get a pipeline by name from the graph.
-    /// 
-    /// # Panics
-    /// Panics if the pipeline was not found by name.
     #[inline(always)]
-    pub fn pipeline(&self, name: &str) -> &Pipeline {
+    pub fn pipeline(&self, id: u64) -> &Pipeline {
-        &self.pipelines.get(name)
+        &self.pipelines.get(&id).unwrap().pipeline
-            .unwrap()
-            .pipeline
-    }
-
-    /// Attempt to get a pipeline by name from the graph.
-    /// 
-    /// Returns `None` if the pipeline was not found by name,
-    #[inline(always)]
-    pub fn try_pipeline(&self, name: &str) -> Option<&Pipeline> {
-        self.pipelines.get(name)
-            .map(|p| &p.pipeline)
-    }
-
-    /// Get a [`RenderPipeline`] by name from the graph.
-    /// 
-    /// # Panics
-    /// Panics if the pipeline was not found by name, or if the pipeline is not a render pipeline.
-    #[inline(always)]
-    pub fn render_pipeline(&self, name: &str) -> &RenderPipeline {
-        self.pipelines.get(name)
-            .unwrap()
-            .pipeline
-            .as_render()
-    }
-
-    /// Attempt to get a [`RenderPipeline`] by name from the graph.
-    /// 
-    /// Returns `None` if the pipeline was not found by name, or if the pipeline is not a render pipeline.
-    #[inline(always)]
-    pub fn try_render_pipeline(&self, name: &str) -> Option<&RenderPipeline> {
-        self.pipelines.get(name)
-            .and_then(|p| p.pipeline.try_as_render())
-    }
-
-    /// Get a [`ComputePipeline`] by name from the graph.
-    /// 
-    /// # Panics
-    /// Panics if the pipeline was not found by name, or if the pipeline is not a compute pipeline.
-    #[inline(always)]
-    pub fn compute_pipeline(&self, name: &str) -> &ComputePipeline {
-        &self.pipelines.get(name)
-            .unwrap()
-            .pipeline
-            .as_compute()
-    }
-
-    /// Attempt to get a [`ComputePipeline`] by name from the graph.
-    /// 
-    /// Returns `None` if the pipeline was not found by name, or if the pipeline is not a render pipeline.
-    #[inline(always)]
-    pub fn try_compute_pipeline(&self, name: &str) -> Option<&ComputePipeline> {
-        self.pipelines.get(name)
-            .and_then(|p| p.pipeline.try_as_compute())
     }
 
     #[inline(always)]
@@ -228,19 +325,24 @@ impl RenderGraph {
 
     #[inline(always)]
     pub fn bind_group(&self, id: u64) -> &wgpu::BindGroup {
-        self.try_bind_group(id)
+        self.try_bind_group(id).expect("Unknown id for bind group")
-            .expect("Unknown id for bind group")
     }
 
     #[inline(always)]
     pub fn try_slot_bind_group(&self, id: u64) -> Option<&wgpu::BindGroup> {
-        self.slots.get(&id)
+        self.slots.get(&id).and_then(|s| {
-            .and_then(|s| self.bind_groups.get(&s.bind_group_id.expect("Slot bind group has not been created yet")))
+            self.bind_groups.get(
+                &s.bind_group_id
+                    .expect("Slot bind group has not been created yet"),
+            )
+        })
     }
 
     #[inline(always)]
     pub fn slot_bind_group(&self, id: u64) -> &wgpu::BindGroup {
-        let bg_id = self.slots.get(&id)
+        let bg_id = self
+            .slots
+            .get(&id)
             .expect("unknown slot id")
             .bind_group_id
             .expect("Slot bind group has not been created yet");
@@ -248,17 +350,50 @@ impl RenderGraph {
     }
 }
 
+pub(crate) struct BufferWrite {
+    /// The name of the slot that has the resource that will be written
+    target_slot: String,
+    bytes: Vec<u8>,
+}
+
 pub struct RenderGraphContext<'a> {
-    encoder: wgpu::CommandEncoder,
+    /// Becomes None when the encoder is submitted
-    queue: &'a wgpu::Queue,
+    pub(crate) encoder: wgpu::CommandEncoder,
+    pub(crate) queue: &'a wgpu::Queue,
+    pub(crate) buffer_writes: Vec<BufferWrite>,
+    renderpass_desc: Vec<wgpu::RenderPassDescriptor<'a, 'a>>,
 }
 
 impl<'a> RenderGraphContext<'a> {
-    pub fn begin_render_pass(&mut self, desc: &wgpu::RenderPassDescriptor) -> wgpu::RenderPass {
+    pub fn new(encoder: wgpu::CommandEncoder, queue: &'a wgpu::Queue) -> Self {
-        todo!()
+        Self {
+            encoder,
+            queue,
+            buffer_writes: vec![],
+            renderpass_desc: vec![],
+        }
+    }
+
+    pub fn begin_render_pass(
+        &'a mut self,
+        desc: wgpu::RenderPassDescriptor<'a, 'a>,
+    ) -> wgpu::RenderPass {
+        self.encoder.begin_render_pass(&desc)
     }
 
     pub fn begin_compute_pass(&mut self, desc: &wgpu::ComputePassDescriptor) -> wgpu::ComputePass {
-        todo!()
+        self.encoder.begin_compute_pass(desc)
+    }
+
+    pub fn write_buffer(&mut self, target_slot: &str, bytes: &[u8]) {
+        //self.queue.write_buffer(buffer, offset, data)
+        self.buffer_writes.push(BufferWrite {
+            target_slot: target_slot.to_string(),
+            bytes: bytes.to_vec(),
+        })
+    }
+
+    pub fn write_buffer_muck<T: bytemuck::NoUninit>(&mut self, target_slot: &str, bytes: T) {
+        self.write_buffer(target_slot, bytemuck::bytes_of(&bytes));
     }
 }

lyra-game/src/render/graph/pass.rs

@@ -28,6 +28,23 @@ pub enum SlotValue {
     Buffer(wgpu::Buffer),
 }
 
+impl SlotValue {
+    /// Gets `self` as a texture, panics if self is not a instance of [`SlotValue::Texture`].
+    pub fn as_texture(&self) -> &wgpu::Texture {
+        match self {
+            Self::Texture(t) => t,
+            _ => panic!("self is not an instance of SlotValue::Texture"),
+        }
+    }
+
+    pub fn as_texture_view(&self) -> &wgpu::TextureView {
+        match self {
+            Self::TextureView(t) => t,
+            _ => panic!("self is not an instance of SlotValue::TextureView"),
+        }
+    }
+}
+
 #[derive(Clone, Debug)]
 pub enum SlotDescriptor {
     /// Most likely this slot is an input, so it doesn't need to specify the descriptor.
@@ -57,6 +74,21 @@ pub struct RenderPassSlot {
     pub desc: Option<SlotDescriptor>,
 }
 
+#[derive(Clone)]
+pub struct RenderGraphPipelineInfo {
+    pub label: String,
+    pub source: String,
+}
+
+impl RenderGraphPipelineInfo {
+    pub fn new(label: &str, source: &str) -> Self {
+        Self {
+            label: label.to_string(),
+            source: source.to_string(),
+        }
+    }
+}
+
 #[derive(Clone)]
 pub struct RenderGraphPassDesc {
     pub id: u64,
@@ -64,16 +96,18 @@ pub struct RenderGraphPassDesc {
     pub pass_type: RenderPassType,
     pub slots: Vec<RenderPassSlot>,
     slot_names: HashMap<String, u64>,
+    pub pipeline_info: Option<RenderGraphPipelineInfo>,
 }
 
 impl RenderGraphPassDesc {
-    pub fn new(id: u64, name: &str, pass_type: RenderPassType) -> Self {
+    pub fn new(id: u64, name: &str, pass_type: RenderPassType, pipeline_info: Option<RenderGraphPipelineInfo>) -> Self {
         Self {
             id,
             name: name.to_string(),
             pass_type,
             slots: vec![],
             slot_names: HashMap::default(),
+            pipeline_info
         }
     }
 
@@ -84,7 +118,7 @@ impl RenderGraphPassDesc {
 
     #[inline(always)]
     pub fn add_buffer_slot(&mut self, id: u64, name: &str, attribute: SlotAttribute, desc: Option<SlotDescriptor>) {
-        debug_assert!(matches!(desc, Some(SlotDescriptor::Buffer(_)) | Some(SlotDescriptor::BufferInit(_)) ),
+        debug_assert!(matches!(desc, None | Some(SlotDescriptor::Buffer(_)) | Some(SlotDescriptor::BufferInit(_)) ),
             "slot descriptor does not match the type of slot");
 
         let slot = RenderPassSlot {
@@ -99,7 +133,7 @@ impl RenderGraphPassDesc {
 
     #[inline(always)]
     pub fn add_texture_slot(&mut self, id: u64, name: &str, attribute: SlotAttribute, desc: Option<SlotDescriptor>) {
-        debug_assert!(matches!(desc, Some(SlotDescriptor::Texture(_))),
+        debug_assert!(matches!(desc, None | Some(SlotDescriptor::Texture(_))),
             "slot descriptor does not match the type of slot");
         
         let slot = RenderPassSlot {
@@ -114,7 +148,7 @@ impl RenderGraphPassDesc {
 
     #[inline(always)]
     pub fn add_texture_view_slot(&mut self, id: u64, name: &str, attribute: SlotAttribute, desc: Option<SlotDescriptor>) {
-        debug_assert!(matches!(desc, Some(SlotDescriptor::TextureView(_))),
+        debug_assert!(matches!(desc, None | Some(SlotDescriptor::TextureView(_))),
             "slot descriptor does not match the type of slot");
         
         let slot = RenderPassSlot {
@@ -128,8 +162,8 @@ impl RenderGraphPassDesc {
     }
 
     #[inline(always)]
-    pub fn add_texture_sampler_slot(&mut self, id: u64, name: &str, attribute: SlotAttribute, desc: Option<SlotDescriptor>) {
+    pub fn add_sampler_slot(&mut self, id: u64, name: &str, attribute: SlotAttribute, desc: Option<SlotDescriptor>) {
-        debug_assert!(matches!(desc, Some(SlotDescriptor::Sampler(_))),
+        debug_assert!(matches!(desc, None | Some(SlotDescriptor::Sampler(_))),
             "slot descriptor does not match the type of slot");
         
         let slot = RenderPassSlot {
@@ -161,8 +195,8 @@ pub trait RenderGraphPass: 'static {
     /// Create a render pass describer.
     /// 
     /// The `id` argument is passed as mutable so you can increment it as you use it for new slots.
-    fn desc(&self, graph: &mut RenderGraph, id: &mut u64) -> RenderGraphPassDesc;
+    fn desc<'a, 'b>(&'a self, graph: &'b mut RenderGraph) -> RenderGraphPassDesc;
 
-    fn prepare(&mut self, world: &mut World);
+    fn prepare(&mut self, world: &mut World, context: &mut RenderGraphContext);
     fn execute(&mut self, graph: &mut RenderGraph, desc: &RenderGraphPassDesc, context: &mut RenderGraphContext);
 }

lyra-game/src/render/graph/passes/mod.rs

@@ -1,4 +1,4 @@
-mod light_cull_compute;
+/* mod light_cull_compute;
 pub use light_cull_compute::*;
 
 mod base;
@@ -6,3 +6,9 @@ pub use base::*;
 
 mod depth_prepass;
 pub use depth_prepass::*;
+
+mod simple_phong;
+pub use simple_phong::*; */
+
+mod triangle;
+pub use triangle::*;

lyra-game/src/render/graph/passes/triangle.rs

@@ -0,0 +1,95 @@
+use glam::UVec2;
+use tracing::warn;
+
+use crate::{
+    render::{
+        camera::{CameraUniform, RenderCamera},
+        graph::{
+            BufferInitDescriptor, RenderGraphContext, RenderGraphPass, RenderGraphPassDesc,
+            RenderGraphPipelineInfo, RenderPassType, SlotAttribute, SlotDescriptor,
+        },
+        renderer::ScreenSize,
+    },
+    scene::CameraComponent,
+};
+
+/// Supplies some basic things other passes needs.
+///
+/// screen size buffer, camera buffer,
+#[derive(Default)]
+pub struct TrianglePass;
+
+impl TrianglePass {
+    pub fn new() -> Self {
+        Self::default()
+    }
+}
+
+impl RenderGraphPass for TrianglePass {
+    fn desc(
+        &self,
+        graph: &mut crate::render::graph::RenderGraph,
+    ) -> crate::render::graph::RenderGraphPassDesc {
+        let mut desc = RenderGraphPassDesc::new(
+            graph.next_id(),
+            "TrianglePass",
+            RenderPassType::Render,
+            Some(RenderGraphPipelineInfo::new(
+                "TriangleShader",
+                include_str!("../../shaders/triangle.wgsl"),
+            )),
+        );
+
+        desc.add_texture_view_slot(graph.next_id(), "window_texture_view", SlotAttribute::Input, None);
+
+        /* desc.add_buffer_slot(graph.next_id(), "screen_size_buffer", SlotAttribute::Output, Some(SlotDescriptor::BufferInit(BufferInitDescriptor {
+            label: Some("B_ScreenSize".to_string()),
+            contents: bytemuck::bytes_of(&UVec2::new(800, 600)).to_vec(),
+            usage: wgpu::BufferUsages::UNIFORM | wgpu::BufferUsages::COPY_DST,
+        })));
+        desc.add_buffer_slot(graph.next_id(), "camera_buffer", SlotAttribute::Output, Some(SlotDescriptor::BufferInit(BufferInitDescriptor {
+            label: Some("B_Camera".to_string()),
+            contents: bytemuck::bytes_of(&CameraUniform::default()).to_vec(),
+            usage: wgpu::BufferUsages::UNIFORM | wgpu::BufferUsages::COPY_DST,
+        }))); */
+
+        desc
+    }
+
+    fn prepare(&mut self, world: &mut lyra_ecs::World, context: &mut RenderGraphContext) {}
+
+    fn execute(
+        &mut self,
+        graph: &mut crate::render::graph::RenderGraph,
+        desc: &crate::render::graph::RenderGraphPassDesc,
+        context: &mut crate::render::graph::RenderGraphContext,
+    ) {
+        let view = graph.slot_value(graph.slot_id("window_texture_view").unwrap()).unwrap().as_texture_view();
+        let encoder = &mut context.encoder;
+
+        let mut pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
+            label: Some("TrianglePass"),
+            color_attachments: &[
+                // This is what @location(0) in the fragment shader targets
+                Some(wgpu::RenderPassColorAttachment {
+                    view: &view,
+                    resolve_target: None,
+                    ops: wgpu::Operations {
+                        load: wgpu::LoadOp::Clear(wgpu::Color {
+                            r: 0.1,
+                            g: 0.2,
+                            b: 0.3,
+                            a: 1.0,
+                        }),
+                        store: true,
+                    },
+                }),
+            ],
+            depth_stencil_attachment: None,
+        });
+
+        let pipeline = graph.pipeline(desc.id);
+        pass.set_pipeline(&pipeline.as_render());
+        pass.draw(0..3, 0..1);
+    }
+}

lyra-game/src/render/graph/slot_desc.rs

@@ -40,6 +40,19 @@ impl TextureViewDescriptor {
             array_layer_count: d.array_layer_count,
         }
     }
+
+    pub fn as_wgpu<'a>(&self, label: Option<&'a str>) -> wgpu::TextureViewDescriptor<'a> {
+        wgpu::TextureViewDescriptor {
+            label,
+            format: self.format,
+            dimension: self.dimension,
+            aspect: self.aspect,
+            base_mip_level: self.base_mip_level,
+            mip_level_count: self.mip_level_count,
+            base_array_layer: self.base_array_layer,
+            array_layer_count: self.array_layer_count,
+        }
+    }
 }
 
 
@@ -117,6 +130,21 @@ pub struct TextureDescriptor {
     pub view_formats: Vec<wgpu::TextureFormat>,
 }
 
+impl TextureDescriptor {
+    pub fn as_wgpu<'a>(&'a self, label: Option<&'a str>) -> wgpu::TextureDescriptor<'a> {
+        wgpu::TextureDescriptor {
+            label,
+            size: self.size,
+            mip_level_count: self.mip_level_count,
+            sample_count: self.sample_count,
+            dimension: self.dimension,
+            format: self.format,
+            usage: self.usage,
+            view_formats: &self.view_formats,
+        }
+    }
+}
+
 #[repr(C)]
 #[derive(Clone, Debug, PartialEq, Eq, Hash)]
 pub struct BufferDescriptor {
@@ -134,7 +162,7 @@ pub struct BufferDescriptor {
 }
 
 impl BufferDescriptor {
-    pub fn as_wgpu(&self, label: Option<&str>) -> wgpu::BufferDescriptor {
+    pub fn as_wgpu<'a>(&self, label: Option<&'a str>) -> wgpu::BufferDescriptor<'a> {
         wgpu::BufferDescriptor {
             label,
             size: self.size,
@@ -156,7 +184,7 @@ pub struct BufferInitDescriptor {
 }
 
 impl BufferInitDescriptor {
-    pub fn as_wgpu(&self, label: Option<&str>) -> wgpu::util::BufferInitDescriptor {
+    pub fn as_wgpu<'a>(&'a self, label: Option<&'a str>) -> wgpu::util::BufferInitDescriptor<'a> {
         wgpu::util::BufferInitDescriptor {
             label,
             contents: &self.contents,

lyra-game/src/render/render_pipeline.rs

@@ -56,13 +56,14 @@ impl RenderPipeline {
                 // Requires Features::CONSERVATIVE_RASTERIZATION
                 conservative: false,
             },
-            depth_stencil: Some(wgpu::DepthStencilState {
+            /*depth_stencil: Some(wgpu::DepthStencilState {
                 format: RenderTexture::DEPTH_FORMAT,
                 depth_write_enabled: true,
                 depth_compare: wgpu::CompareFunction::Less,
                 stencil: wgpu::StencilState::default(), // TODO: stencil buffer
                 bias: wgpu::DepthBiasState::default(),
-            }),
+            }),*/
+            depth_stencil: None,
             multisample: wgpu::MultisampleState {
                 count: 1,
                 mask: !0,

lyra-game/src/render/renderer.rs

@@ -1,4 +1,5 @@
 use std::collections::{VecDeque, HashSet};
+use std::ops::{Deref, DerefMut};
 use std::rc::Rc;
 use std::sync::Arc;
 use std::borrow::Cow;
@@ -18,7 +19,7 @@ use wgpu::util::DeviceExt;
 use winit::window::Window;
 
 use crate::math::Transform;
-use crate::render::graph::{BasePass, DepthPrePass, LightCullComputePass};
+use crate::render::graph::TrianglePass;
 use crate::render::material::MaterialUniform;
 use crate::render::render_buffer::BufferWrapperBuilder;
 use crate::scene::CameraComponent;
@@ -44,6 +45,20 @@ type SceneHandle = ResHandle<SceneGraph>;
 #[derive(Clone, Copy, Debug)]
 pub struct ScreenSize(glam::UVec2);
 
+impl Deref for ScreenSize {
+    type Target = glam::UVec2;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl DerefMut for ScreenSize {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}
+
 pub trait Renderer {
     fn prepare(&mut self, main_world: &mut World);
     fn render(&mut self) -> Result<(), wgpu::SurfaceError>;
@@ -212,9 +227,15 @@ impl BasicRenderer {
         //let light_cull_compute = LightCullCompute::new(device.clone(), queue.clone(), size, &light_uniform_buffers, &camera_buffer, &mut depth_texture);
 
         let mut g = RenderGraph::new(config.clone());
-        g.add_pass(BasePass::new());
+        /* debug!("Adding base pass");
+        g.add_pass(TrianglePass::new());
+        debug!("Adding depth pre-pass");
         g.add_pass(DepthPrePass::new());
-        g.add_pass(LightCullComputePass::new(size));
+        debug!("Adding light cull compute pass");
+        g.add_pass(LightCullComputePass::new(size)); */
+
+        debug!("Adding triangle pass");
+        g.add_pass(TrianglePass::new());
         g.setup(&device);
 
         let mut s = Self {
@@ -261,7 +282,7 @@ impl Renderer for BasicRenderer {
 
     #[instrument(skip(self))]
     fn render(&mut self) -> Result<(), wgpu::SurfaceError> {
-        self.graph.render(self);
+        self.graph.render(&self.device, &self.queue, &self.surface);
 
         Ok(())
     }
@@ -276,7 +297,7 @@ impl Renderer for BasicRenderer {
             // tell other things of updated resize
             self.surface.configure(&self.device, &self.config);
 
-            let mut world_ss = world.get_resource::<ScreenSize>();
+            let mut world_ss = world.get_resource_mut::<ScreenSize>();
             world_ss.0 = glam::UVec2::new(new_size.width, new_size.height);
             self.graph.surface_config = self.config.clone();
         }

lyra-game/src/render/shaders/triangle.wgsl

@@ -0,0 +1,19 @@
+struct VertexOutput {
+    @builtin(position) clip_position: vec4<f32>,
+};
+
+@vertex
+fn vs_main(
+    @builtin(vertex_index) in_vertex_index: u32,
+) -> VertexOutput {
+    var out: VertexOutput;
+    let x = f32(1 - i32(in_vertex_index)) * 0.5;
+    let y = f32(i32(in_vertex_index & 1u) * 2 - 1) * 0.5;
+    out.clip_position = vec4<f32>(x, y, 0.0, 1.0);
+    return out;
+}
+
+@fragment
+fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
+    return vec4<f32>(0.3, 0.2, 0.1, 1.0);
+}